*{
    margin: 0px;
    padding: 0px;
}
iframe{
    border: 1px solid red;
    width: 100%;
    height: 100%;
}
.sheet{
    margin-top: 10px;
    margin-left: 20px;
    width: 20%;
    height: 720px;
    border: 1px solid greenyellow;
    float: left;
}
.tupian{
    margin-top: 10px;
    margin-left: 30px;
    float: left;
    border: 1px solid darkgreen;
    width: 75%;
    height: 690px;
}
.div0{
    float: left;
    width: 100%;
    height:120px;
    background-color: #ff7800;
    text-align: center;
    font-size: 30px;
}
.div1{
    float: left;
    width: 100%;
    height:120px;
    background-color: #009900;
    text-align: center;
    font-size: 30px;
}
.div23{
    float: left;
    width: 60%;
    height:200px;
}
.div2{
    float: left;
    width: 100%;
    height:100px;
    background-color: #990099;
    text-align: center;
    font-size: 30px;
}
.div3{
    clear: both;
    width: 100%;
    height:100px;
    background-color: #990000;
    float: left;
    text-align: center;
    font-size: 30px;
}
.div4{
    float: left;
    width: 40%;
    height:200px;
    background-color: deepskyblue;
    text-align: center;
    font-size: 30px;
}
.div5{
    float: left;
    width: 50%;
    height:120px;
    background-color: yellow;
    text-align: center;
    font-size: 30px;
}
.div6{
    float: left;
    width: 50%;
    height:120px;
    background-color: aqua;
    text-align: center;
    font-size: 30px;
}
.div7{
    float: left;
    width: 100%;
    height:125px;
    background-color: khaki;
    text-align: center;
    font-size: 30px;
}
